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MJKoski wrote:
One thing they could perhaps do is to buffer pixel value and reset the pixel from zero again once it reaches saturation point. This would also create very high DR.
Fullwell capacity would not matter much.
I guess you mean that higher FWC alone does not solve the problem of dynamic range in the readout circuits. That is true for engineering dynamic range, but would still help a lot for useful photgraphic dynamic range, where the noise floor is defined by a visually acceptable low noise with a higher signal to noise ratio than 1.
It is also difficult to increase the native FWC on the sensor by enough to really matter without sacrificing other aspects of performance.
Reset-and-continue could be a way to go, but still has challenges with the reset time interrupting the exposure. It would probably be much better than just blending successive exposures though.
Another possibility is to swith to gain < 1 at a given threshold, say at 1/2 FWC. If we have a FWC of 20000 e- as an example, at 10000 e- the photon shot noise is already 100 e- and we could switch to a gain of 1/32 without much increased noise, and gain 5 stops in DR.
I hope that sensor manufacturers see potential development in higher effective FWC, as the quantum efficieny race is almost closed and there is not much more to have in the high ISO race.
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